ssh

To make the connection to the remote server easier, let’s first add an entry to /etc/hosts for the devops server so that we don’t need to remember the IP address all the time.

127.0.0.1       localhost
192.168.1.120   joy
xx.xxx.xxx.xx   devops

Now, if you want to connect to the devops server from your desktop, you can just issue

ssh devops

You can see that I don’t have any user before devops because my current user on the desktop is the same on the devops server. Otherwise, you have to use a command like this.

ssh user@devops

Now you can connect to the devops server with ssh after you provide your password. It is still not very convenient as you have to type your password every time.

The next step, we can upload the public key to the server so that we don’t need to type the password anymore.

For the steps to generate the key and upload it, please refer to

https://www.ssh.com/ssh/copy-id

The following are my commands for reference only.

ssh-copy-id -i ~/.ssh/id_rsa.pub steve@devops

From now on, you can type ssh devops to log in to the server without providing a password. It is an essential step to allow light-bot to run commands on the remote server automatically if you want to leverage it.